Reconnaissance of the Geotechnical Aspects of the February 28, 2001 Nisqually Earthquake

这一行动是为了支持一项研究，以完成2001年2月28日尼斯夸利地震后第二天开始的震后勘察工作，并进一步记录这次地震中地面破坏和建筑物损坏的重要案例。将通过选定的现场和实验室测试，开发出在发生严重和轻微地面破坏的地点的建筑物性能的有据可查的案例历史。 这些案例将记录在尼斯夸利地震震后勘测期间开发的网站上，并将发表在地震工程研究所（EERI）《光谱》杂志上。 及时报告这些结果将使研究人员能够将这些数据纳入正在进行的研究，并确定这一重要的太平洋西北地震所带来的额外工作。布雷教授和他的一些同事和研究生研究人员立即前往尼斯夸利地震的受灾地区，并作为一个更大的勘察团队的一部分，完成了这次事件的一些更重要的岩土工程方面的文件。 这包括对涉及Deschutes百老汇的重大横向扩展的地面变形进行详细调查，绘制马丁路路堤故障的地面变形图，记录和采样南西雅图几个建筑物地基的沉积物喷出物，以及对101号公路路堤破坏的测量。其目标如下-通过完成这些重要案例记录的文件，将部分满足研究的需要，重点是奥林匹亚的Deschutes百老汇和南西雅图的建筑基础性能。 华盛顿州自然资源部的斯蒂芬·P·帕尔默在地震后的勘察工作中提供了协助，他将参与目前的项目。

This action is to support a study to complete the post-earthquake reconnaissance effort begun the day after the February 28, 2001 Nisqually Earthquake, and to further document observations of important cases of ground failure and building damage from this event.Well-documented case histories of building performance at sites undergoing severe and minor ground failure will be developed through selected field and laboratory testing. These case histories will be documented at the website developed during the post-earthquake reconnaissance of the Nisqually earthquake, and in a paper to be published in the Journal "Spectra" of the Earthquake Engineering Research Institute (EERI). Timely reporting of these results will enable researchers to incorporate these data into ongoing studies and identify additional work resulting from this important Pacific Northwest earthquake. Professor Bray and some of his colleagues and graduate student researchers traveled immediately to the affected area of the Nisqually earthquake, and as part of a larger reconnaissance team completed documentation of some of the more important geotechnical aspects of this event. This included conducting detailed surveys of ground deformation from a significant lateral spread involving the Deschutes Parkway, mapping of ground deformation at the Martin Way embankment failure, documentation and sampling of sediment ejecta in several building foundations in South Seattle, and surveying of the Highway 101 embankment failure.The goals of this follow-up study will be met in part by completing documentation of these important case records, with emphasis on the Deschutes Parkway in Olympia and the building foundations performance in South Seattle. Stephen P. Palmer, Washington State Department of Natural Resources, assisted during the post-earthquake reconnaissance effort and who will be involved in this current project.